I would like to frame my kitchen cabinets with some type of trim .
+4
Would like to give them an updated look. Unsure if I should try to stain them or paint them.
Unless you are planning on painting your cupboards also, I would stick with trying to match the stain that you presently have on your cupboards.
You could do a shaker style with 1/4" x 2" trim. https://www.google.com/search?q=shaker+style+cabinets+kitchen&client=opera&hs=vn2&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjX2beR5cHWAhVY_mMKHVoTBjMQ7AkIXw&biw=1366&bih=629 I would paint them for sure, sand, prime, paint.
I would get new hidden hinges and door hardware to update them also.
And I would redo that faux brick backsplash for some kind of tile or use tin ceiling tiles for a metallic look.
If you're going to add trim to change the door style and/or add molding, I would definitely paint them. It would be easier to get a uniform color with paint than to try to match the new stain to the old wood.
I would definitely paint them a light color, maybe even a cream or a white. That would give some brightness to the kitchen. It looks like there is a lot of dark going on in there.
I used Ever True picture frame moulding (from Lowes) to update my room doors. It comes in smaller sizes than what I used and could easily be used on cabinets. link to my post attached.
http://www.hometalk.com/diy/home-tours/ugly-door-makeover-31703821?expand_all_questions=1
Ugly Door Makeover
Painting gives you many more options, and is a lot easier than staining. There's beautiful trims at home improvement stores. Also nice door hardware will give them a beautiful look.